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Home → Publications → Forest Nursery Notes → 2009 Winter Forest Nursery Notes → 2009 Winter Forest Nursery Notes - New Nursery Literature → Frost Damage in Pinus Sylvestris L. Stems Assessed by Cholorophyll Fluorescence in Cortical Bark Chlorenchyma

Frost Damage in Pinus Sylvestris L. Stems Assessed by Cholorophyll Fluorescence in Cortical Bark Chlorenchyma

Peguero-Pina, J. J., Morales, F., and Gil-Pelegrin, E. Annals of Forest Science 65:813-818. 2008.

Several techniques were used to investigate the threshold minimum temperature inducing severe frost damage during winter in Scots pine (Pinus sylvestris L.) needles and stems from southern provenances in the Iberian Peninsula. Chlorophyll (Chi) fluorescence, electrolyte leakage (EL), visual scoring (VS), and the normalized difference vegetation index (NDVI) were compared. Chi fluorescence, and in particular the maximum potential photosystem II (PSII) efficiency- estimated through the dark-acclimated Fv/FM ratio-, was found to be a simple, non-destructive indicator of freezing tolerance in needles, as expected. Moreover, the existence of a Chi-containing tissue, the cortical bark chlorenchyma, allowed us the use of Chi fluorescence as a new non-destructive indicator of frost damage in live tissues of Pinus sylvestris L. stems. Freezing tolerance values of southern provenances are compared with those found by other authors in the northern distribution limit of the species.


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Author(s): José Javier Peguero-Pina, Fermín Morales, Eustaquio Gil-Pelegrín

Section: Seedling Physiology and Morphology

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